Other contributors have said "Can an ipod touch send txt message?" is the same question as "How you send messages on iPod touch?" If you believe that these are not asking the same thing and should be answered differently, click here
Well, depends which message you refer to. I got an iPod touch te other day, and I discovered you can check your email. And to text, a good quality and free application is called text plus, which you can find in the app store.